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Clinoptilolite is a natural zeolite comprising a microporous arrangement of silica and alumina tetrahedra. It has the complex formula: (Na,K,Ca)2-3Al3(Al,Si)2Si13O36·12(H2O). It forms as white to reddish tabular monoclinic tectosilicate crystals with a Mohs hardness of 3.5 to 4 and a specific gravity of 2.1 to 2.2. It commonly occurs as a devitrification product of volcanic glass shards in tuff and as vesicle fillings in basalts, andesites and rhyolites. It was described in 1969 from an occurrence in Owl Canyon, San Bernardino County, California, U.S.A.
Additional recommended knowledge
Use of clinoptilolite in industry and academia focuses on its ion exchange properties having a strong exchange affinity for ammonia (NH4+). A typical example of this is in its use as an enzyme based urea sensor.
Research is generally focussed around Turkey and Greece due to the abundance of natural clinoptilolite in easily accessible surface deposits.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Clinoptilolite". A list of authors is available in Wikipedia.|